Means for supporting drills.



F.'.CRIST.

MEANS-FOR SUPPORTING DRILLS. APPLICATION FILED MAY II, I9I5.

Patented May 30,1916.

I rim FRANK carer, or (donor/Inns, OHIO.

MEANS FOR sUrroia'rING nnrLLs.

iaeasas.

Application filed May 11. 1915.

To all whom it may concern:

Be it known that I, FRANK CRIs'r, a citizen of the United States, and a resident of Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Means for Supporting Drills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in means for supporting drills on or against the work to be drilled.

The object of my invention is to provide I a drill supporting device which may be readily and quickly secured to fixed supports, and which is provided with means which may be actuated manually or automatically to hold the drill to its work, irrespective of the relative position of the drill to the work.

With this object in view my invention consists in the parts and combinations of parts as will be more fully explained and pointed out in the claims.

In the accompanying drawings; Figure 1 is a view in elevation showing the drill attached to a plate to be drilled, and Fig. 2 is a view of the drum and the means for holding and turning the same.

1 represents a bit which in the present instance is actuated by air but which may be driven by electricity or other suitable means, and 2 is a chamber carrying the motor for actuating the bit. Secured to the end of the chamber or drill casing, on the side opposite that from which the bit projects, is a centrally located stud 3 threaded externally, and inclined arms 4: supporting the ring 5 at their outer ends, the ring being concentric with the stud 3 for supporting the frame 6. This frame 6 is provided with a threaded socket to engage the stud, and is of a size and shape to snugly fit within and be supported by the ring 5 when the parts are assembled. This frame is bifurcated at its opposite end, to receive and support the Specification of Letters Patent.

iatentedli liay 30, 1916.-

Serial No. 2?,413.

of the chain will wind in the same direction on the drum as shown in Fig. 1. The chain is provided at each of its ends with the loops 12, each of which is provided with an openlng 13 large enough for the free passage of the links of a chain 15, and with a slot 16, which is in open communication withthe opening 13 in said loop, and which is wide enough to receive a link when the long diameter of the latter is in the plane of the long diameter of the slot, but not wide enough for the passage of a link when the long diameter of the latter is at right angles to the slot, hence when a link of each of the chains 15 is placed in their respective slots 16, the links on either side will lock them against the possibility of accidental displacement while the chains are under pulling stresses. The free end of each chain 16 carries a hook: 17 for its attachment to the work to be drilled or to any other fixed object or objects adjacent the work. The frame 6 carries a spring actuated pawl 18, which is normally in engagement with both ratchets 11, and operates to prevent a reverse rotation of the latter, but which is free to yield and ride over the teeth of the ratchet wheel as the latter turns in a direction to wind up the chain 10.

Pivotally mounted on the pin 8 carried by frame 6, is the handle 18, substantially iden tical in shape and construction with frame 6, except that it is larger. This handle carries a pawl 19 which engages the teeth of both ratchet Wheels 11, so that by pulling the handle to the left (in Fig. 1) the chain will be wound on the drum until all slack has been taken up, thusrigidly supporting the drill in proper position with relation to the work. This position can be readily and quickly .accomplished by proper adjustment of chains 10 and 15, as to length, and by chain 10 within the drum before commencing to wind said chain on the drum. The handle 18 may be of a weight suiiicient so that by placing it a little off the center its weight will operate automatically to wind up the chain as the drill sinks into the work being drilled, thus enabling the operator to give his entire attention to the work. If the drill be boring upwardly, the handle 18 may be turned to the right more than 90, so that its weight will operate to automatically take up the slack in the chain as the work progresses.

The handle 18 and the frame 6 are reversible, that is to say, either can be used as the frame and either as the handle, and

Y instead of threading the socket, therein as previously described and as shown in the frame 6, it may be left plain as shown in the handle endv of both figures of the drawing, so as to fit over'a plain stud.

V ratchet. It may be readily and quickly applied to anypiece of work, and be readily released after the'hole has been drilled.

It is'evident that many slight changes might be resorted to in the'relative arrangement of parts shown and describedwithout departing from the spirit and scope of my claims. Hence I would have it understood that I (110- not wish to confine myself to the exact construction herein shown and described, except as required by the scope of the claims. I 7

Having fully described myfinvention what I claim as new and desire to secure by Letters] Patent, is

l. A 7 Supporting attachment for drills consisting of a frame adaptedto detachably engage a drill casing, the said frame carrying a winding drum, a ratchet wheel rigid.

with the winding. drum, flexible means secured to the drum and adapted to be connected with fixed supports for holding the drill in position relative to the work, a pawl for preventing reverse rotation of the drum, and a handle carrying a pawl engaging the ratchet wheel for rotating the drum in a direction to wind the flexible securing means thereon, the saidhandle being pivoted to the frame whereby the weight thereof assists intaking up the slack in the flexible securing means as the drill penetrates its work.

2. In a drill-support, the combination of aframe'adapted to be secured to a drill. casing, a drum carried by said frame, a ratchet V wheel rigid'with the drum, flexible feeding means attached to the drum and adapted to' be connectedwith fixed supports and means adapted to actby gravity on said drum and comprising .a handle pivotally carried by emu ot'this patent may be obtained for u a es the drum frame and provided with a. pawl for rotating the ratchet wheel in a direction to wind the flexible means thereon.

3. In a drill support the combination of a frame adapted to be detachably secured to a drill casing, a drum carried by said frame and provided with an opening through same, a chain passed through said opening, each end of the chain adapted to engage a fixed support, a ratchet wheel concentric cated handle pivoted to the bifurcated frame andprovid'ed with a pawl to engage the ratchet wheel for turning the latter in a direction to wind up the flexible means,

the said handle adapted to act by gravity.

5. In a drill support, the combination of a bifurcated frame adapted to be attachedto:

a drill casing, a drum mounted in the bifurcated end of said frame, a ratchet wheel rigid with the drum, a chain passed through an opening in the drum, both ends of the chain leaving the drum at the same side, a chain adjustably secured to each end of said chain, a bifurcated handle pivoted to bifurcated end of the drum frame and provided with a pawl adapted to engage the ratchet wheel for rotating the same and the drum in a direction to wind the chain on the drum andmeans for preventing reverse movement of said ratchet wheel;

In testimony whereof, I have signed: this specification in the presence of two- S1113!- scribing witnesses.

FRANK CRIST.

I'Vitnesses C. H. WEBER,

B. BING.

:five cents each, by addressing the "Commissioner 01 I'atenu, Washington, D. 0. 

